Experimental study of organically bound tritium preparation condition in plant

Dan MENG; Weijuan WANG; Wei WEN; Yang DU; Yinhang ZHOU; Zhaoyi TAN; Heyi WANG

doi:10.11889/j.0253-3219.2016.hjs.39.090302

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Experimental study of organically bound tritium preparation condition in plant

NUCLEAR CHEMISTRY, RADIOCHEMISTRY, RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE | 更新时间：2021-05-24

- Experimental study of organically bound tritium preparation condition in plant
- NUCLEAR TECHNIQUES Vol. 39, Issue 9, Article number: 090302(2016)
- 作者机构：
  
  中国工程物理研究院核物理与化学研究所绵阳 621900
- 作者简介：
- 基金信息：
  
  Supported by Safety and Environmental Protection Occupational Health Research Project of China Academy of Engineering Physics
- DOI：10.11889/j.0253-3219.2016.hjs.39.090302
  CLC： TL72
- Received：22 March 2016，
  
  Revised：28 May 2016，
  
  Published：2016-09
- 稿件说明：
移动端阅览
Dan MENG, Weijuan WANG, Wei WEN, et al. Experimental study of organically bound tritium preparation condition in plant[J]. Nuclear techniques, 2016, 39(9): 090302
DOI：

Dan MENG, Weijuan WANG, Wei WEN, et al. Experimental study of organically bound tritium preparation condition in plant[J]. Nuclear techniques, 2016, 39(9): 090302 DOI： 10.11889/j.0253-3219.2016.hjs.39.090302.

摘要

为了准确评价环境生物中的氚水平，基于高温催化氧化的原理，建立了一套生物中有机结合氚（Organically Bound Tritium

OBT）的制样装置Pyrolyser高温分解熔炉，通过大量的条件实验，优化了OBT的制样条件，并对典型植物中OBT分析的不确定度进行了研究。结果表明，在该装置中OBT制备的最佳条件为通氧量100mL·min

-1

、催化氧化温度800℃和氧化燃烧温度600℃，此时，植物样品中OBT的回收率可达85%以上。优化后高温分解熔炉的制样过程更加安全，样品燃烧氧化更加充分，完全满足环境植物中OBT的分析要求，可用于环境生物氚水平测量及评价。

Abstract

Background:

In the environment tritium exists primarily as tritiated water(HTO).However

tritium can also be incorporated into organically bound tritium(OBT)in plants and animals

and the OBT of environmental organisms can reflect the environmental tritium level.

Purpose:

In order to accurately evaluate the level of tritium in the biological environment

the furnace of tritium-carbon oxidation burning-pyrolyser pyrolysis has been developed to analyze the OBT activity of environmental plant on the base of the principle of high temperature catalytic oxidation.

Methods:

In this paper

the preparation condition of the pyrolyser-furnace was optimized through a lot of experiments

and the uncertainty of OBT in typical plant was studied.

Results:

The results indicate that the optimum preparation conditions of OBT in plant are with the oxygen flow rate of the working tube at 100 mL·min

-1

the catalytic oxidation temperature at 800°C and the combustion temperature at 600℃.At this point

the recovery rate of combustion for different samples was kept above 85%.

Conclusion:

The sample preparation process of optimized condition is more secure and the combustion of plant sample is more complete

which completely meet the requirement of OBT analysis in environmental plant

and this method can be used in the tritium level measurement and evaluation in the environmental organism.

关键词

Keywords

references

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